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2811.19.61.90

Other

Classification path

  1. Other inorganic acids and other inorganic oxygen compounds of nonmetals
  2. Other inorganic acids
  3. Other
  4. Other
  5. Other

Rates of duty

General (MFN)
4.2%
Column 2Cuba, North Korea, Russia, Belarus
25%
Unit of quantity
kg

Trade agreement rates

FreeGSP (lapsed since Dec 31, 2020), U.S.-Australia FTA, U.S.-Bahrain FTA, U.S.-Chile FTA, U.S.-Colombia TPA, AGOA (authorized through Dec 31, 2026), E, U.S.-Israel FTA, U.S.-Jordan FTA, U.S.-Korea FTA, U.S.-Morocco FTA, U.S.-Oman FTA, CAFTA-DR, U.S.-Panama TPA, U.S.-Peru TPA, USMCA, U.S.-Singapore FTA

Related lines in heading 2811

About heading 2811

Other inorganic acids and other inorganic oxygen compounds of nonmetals

Heading 2811 covers other inorganic acids and other inorganic oxygen compounds of nonmetals, grouped in two ways. The first part covers inorganic acids such as hydrogen fluoride, hydrogen cyanide, arsenic acid, hydrobromic acid and sulfamic acid. The second part covers inorganic oxygen compounds of nonmetals such as carbon dioxide, silicon dioxide and sulfur dioxide.

Full guide to heading 2811

Products in this heading

  • Hydrofluoric acid (hydrogen fluoride)
  • Hydrogen cyanide (hydrocyanic acid)
  • Arsenic acid
  • Hydrobromic acid
  • Sulfamic acid
  • Carbon dioxide
  • Synthetic silica gel
  • Sulfur dioxide

Frequently asked questions

What is the HTS code for hydrogen fluoride?

Hydrogen fluoride (hydrofluoric acid) is classified under 2811.11.00.00, with a general (MFN) rate of Free.

What is the duty on silicon dioxide?

Synthetic silica gel under 2811.22.10.00 carries a general (MFN) rate of 3.7%, while other silicon dioxide under 2811.22.50.00 is Free.

How do I classify sulfamic acid?

Sulfamic acid is not named separately, so it falls under the residual acid subheading 2811.19.61.10, with a general (MFN) rate of 4.2%.

Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.

HTS 2811.19.61.90: Other, 4.2% duty | HTSBase